Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb53f88bd26abce3…

MALICIOUS

PDF

77.1 KB Created: 2021-05-19 18:42:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 6b66765cd978929bb8d90fb463120287 SHA-1: 8ae8d8619f7206a8d80d7c6b13ba5b91b542a4b5 SHA-256: eb53f88bd26abce3ec6f25a1ee50561b4e72436282654262a4e1bee9324415c7
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially harmful sites. The primary malicious URL identified is https://xezojetit.ru/strik?utm_term=evaluation+mouvement+trajectoire+vitesse+6eme, which is likely used for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://xezojetit.ru/strik?utm_term=evaluation+mouvement+trajectoire+vitesse+6eme PDF link annotation
    • https://kowulenube.weebly.com/uploads/1/3/2/7/132740682/zojepuvorawisi.pdfIn PDF document text
    • https://gipurafesab.weebly.com/uploads/1/3/1/6/131637457/6958664.pdfIn PDF document text
    • https://japilulijerimu.weebly.com/uploads/1/3/0/7/130738614/6c24c85038de8.pdfIn PDF document text
    • https://xetuvamabur.weebly.com/uploads/1/3/1/4/131409037/47b21b5.pdfIn PDF document text
    • https://nopuxexej.weebly.com/uploads/1/3/4/4/134498230/5e854772de.pdfIn PDF document text
    • https://nekemobo.weebly.com/uploads/1/3/5/3/135323096/373398.pdfIn PDF document text
    • https://tukobigerokigab.weebly.com/uploads/1/3/4/6/134653943/1824970.pdfIn PDF document text
    • https://wapojopaboxijok.weebly.com/uploads/1/3/4/7/134747084/4ab07f.pdfIn PDF document text
    • https://wamazuwo.weebly.com/uploads/1/3/1/3/131380988/sonitugimukirinuzeru.pdfIn PDF document text
    • https://suzoniku.weebly.com/uploads/1/3/4/4/134456843/2998264.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc6204d4-a2e4-4314-8358-167a4257a51a/11480355540.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/471d102a-349f-49f6-83c8-ce3201a661f1/semuxufituninitefazifovu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50849d21-0b80-4da5-a35e-299742817653/how_much_do_nurses_with_an_associates_degree_make_in_florida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e56f5b1-3dd6-4922-be30-5097025fe4b0/57537925739.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/s_p_global_capital_iq_platform.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fad06777-7119-4ff7-ad32-a761fe3946b3/34985212662.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d81aa27b-cc9d-42c2-9a65-1c48c49516ac/pogumolowexexupitaretu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1841f22-c048-4466-9713-22de161e6109/hp_elite_8000_pci_slots.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/characteristics_of_information_system_security.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9929946c-5c61-43fa-90e4-79fb9597399f/vabujuduro.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB68 5192 bytes
SHA-256: 000998d65d794b589a810be5895935ab30f7e9cbf6267f71e84c9c61a47b1755
font_01_sfnt_off0000fd07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD07 13124 bytes
SHA-256: 2874dd0865e4a5c45ffccab2d2150320c2c52a52b906e8a81c459853e4b7c7dc